The man who Priyanka Chopra's character has a bad date with is played by her real life husband, Nick Jonas. She said that when she read that part of the script she went to him and told him he had to do it because she wouldn't be able to do it with anyone else.
Sam Heughan's character, Rob Burns, is also the name of famed Scottish poet Robert Burns. Robert Burns's poetry is pivotal in reuniting Sam's character Jamie with his love Claire on the show Outlander.
With the exception of Nick Jonas's cameo, no one in the cast is American, despite the movie taking place in New York. Since the movie was filmed in the UK, it was easier to hire Brits and a dialect coach than bring Americans to the UK.
Celine Dion dubbed her own voice for the French language release of the movie.
When sending texts, Mira's phone number reads "167-5309". A subtle reference to the 1981 song "867-5309/Jennie".